Correspondence between Steffan, Wallace C. and Peter Ashlock, 1964, 1968-1969, 1971-1972, Box: 5, Folder: 13. Personal papers of Peter D. Ashlock, PP 515. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/395183 Accessed May 01, 2024.